Add unit test for chunk_metadata

tests/test_publish2cloud.py

@@ -0,0 +1,25 @@
+import time
+
+from mock import mock_open, patch
+
+from publish2cloud import chunk_metadata
+
+
+def test_chunk_metadata():
+    """Test getting metadata from the chunk header of a list file."""
+    chunknum = int(time.time())
+    # Hash of test-track-digest256.dummytracker.org/
+    domain_hash = (b"q\xd8Q\xbe\x8b#\xad\xd9\xde\xdf\xa7B\x12\xf0D\xa2"
+                   "\xf2\x1d\xcfx\xeaHi\x7f8%\xb5\x99\x83\xc1\x111")
+    data = b"a:%d:32:32\n" % chunknum + domain_hash
+
+    with patch("test_publish2cloud.open", mock_open(read_data=data)):
+        with open("base-fingerprinting-track-digest256", "rb") as fp:
+            metadata = chunk_metadata(fp)
+
+    assert metadata["type"] == "a"
+    assert metadata["num"] == str(chunknum)
+    assert metadata["hash_size"] == "32"
+    assert metadata["len"] == "32"
+    assert metadata["checksum"] == ("043493ecb63c5f143a372a5118d04a44df"
+                                    "188f238d2b18e6cd848ae413a01090")